摘要：This paper describes fault-tolerant control strategies for a Permanent Magnet Synchronous
Generator (PMSG)-based Marine Current Turbine (MCT) dealing with the generator-side
converter under faulty conditions. MCT system mainly used PI controllers. However, this type
of controllers is very sensitive to faulty conditions such as an open circuit faults in the
generator-side converter. As consequence, the MCT system represents a high decrease in its
power generation and dynamic performances. In this faulty context, firstly, a fault tolerant
structure consists in requiring only minimum hardware modifications to the converter is
proposed. In the second part, a backstepping and a second-order sliding mode nonlinear control
are therefore investigated for fault-tolerant control purposes. A comparison between the
different control strategies is proposed to prove the most robust one.
